VikingIn the context of the book, a Viking refers to space adventurers who plunder alien civilizations.
Definitions:
Norse explorer and adventurer during the 10th to 12th century"The seafaring Vikings of old have been replaced by space Vikings in the modern day."
A seafaring pirate and adventurer"The Viking was pillaging through the galaxy, in search of wealth."
PlunderTo steal goods typically in the form of organized looting.
Definitions:
Steal goods from, typically using force and in a time of war or civil disorder."The space Viking set out to plunder alien civilizations."
Goods acquired illegally and in a violent manner"The Viking's ship was full of plunder from various galaxies."
CivilizationAn advanced stage of human society, where people live with a reasonable degree of organization and comfort.
Definitions:
The society, culture, and way of life of a particular area"They discovered an advanced alien civilization on the remote planet."
GalaxyA system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
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A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction"Our Milky Way is just one of the billions of galaxies in the universe."
AlienIn the context of the book, refers to beings from outer space
Definitions:
A being from another planet or celestial body"He claimed to have encountered an alien during his space expedition."
Belonging to a foreign country or nation"He felt alien in the new culture he was exposed to."